Materials Literature
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Resonant X-ray scattering (RXS) is a spectroscopy where both the power of site selective diffraction and the power of local absorption spectroscopy regarding atomic species are combined. By virtue of the dependence on the core level state energy and the three dimensional electronic structure of the intermediate state,…
We obtain analytical expressions for the electron self-energy and the electron-phonon coupling in electron-doped graphene using electron-phonon matrix elements extracted from density functional theory simulations. From the electron self-energies we calculate angle-resolved photoemission spectra (ARPES). We demonstrate…
A greener method to fabricate novel core (Fe and Cu)-shell (noble metals) metal nanocrystals using aqueous ascorbic acid (vitamin C) is described. Transition metal salts such as Cu and Fe were reduced using ascorbic acid, a benign naturally available antioxidant, and then addition of noble metal salts resulted in the…
Uncooled infrared bolometer arrays have become the technology of choice for low-cost infrared imaging systems used in applications such as thermography, firefighting, driver night vision, security and surveillance. Uncooled infrared bolometer arrays are reaching performance levels which previously only were possible w…
Dislocations are ubiquitous linear defects and are responsible for many of the properties of crystalline materials. Studies on the glide process of dislocations in bulk materials have mostly focused on the response of dislocations with macroscopic lengths to external loading or unloading. Using in situ transmission el…
We compared the depths of penetration into a semi-infinite shield by a monolithic striker and by a sequence of several segments having the same total mass (a segmented impactor). It is assumed that the striker and the segments do not experience deformation during their penetration. The comparison is based on two appro…
A detailed study of the hole transporting property and stability of the liquid-formed glassy film of a traditional hole transporting material N, N ‘-diphenyl- N, N ‘-bis(3-methylphenyl)benzidine (TPD) prepared by rapid cooling of the melt was carried out. The film obtained via supercooled liquid by a rapid-cooling met…
Barium gallogermanate (BGG) glasses are currently being explored as a viable low cost material for numerous U.S. defense and commercial visible-infrared window applications. These glasses are transparent from 0.4 mum to beyond 5.0 mum and can be easily made in large optics and complex shapes with high index homogeneit…
We propose a graph method for the analysis of electronic surface states in a complex basis superlattice terminated by surface with a multilayer clad. Using topology theory, we frame an energy equation for calculating the surface modes based on a graph model. Compared to the traditional methods, the present method does…
Long-range triplet excited-state equilibration occurs over a nanometric distance between platinum(II) 8-quinolinolate (3Ptq2 = 1.87 eV) and platinum(II) tetraphenylporphyrin (3PtTPP = 1.89 eV). The equilibrium is mediated by a fluorene-thiophene-fluorene bridge (3FTF = 1.92 eV) and is characterized by a double-exponen…
We report the investigation of the ultrafast carrier dynamics in thin tetrahedral amorphous carbon films by means of femtosecond time-resolved reflectivity. We estimated the electron–phonon relaxation time of a few hundred femtoseconds and we observed that under low optical excitation photo-generated carriers decay ac…
2- and 4-probe dark conductivity (DC) data obtained for thin-film and solid-state samples of undoped PZnn oligomers show that the measured DCs for these species span an impressively wide range. Sterically unencumbered PZnn oligomers enable augmented interchain electronic coupling in the solid state and provide electro…
Mesoporous Eu 2 O 3 microspindles have been prepared by a facile solution process followed by subsequent heat treatment. By adding urea stepwise and varying the reaction time, the dimension of the Eu 2 O 3 microspindles can be easily tuned from 250 × 100 nm to 900 × 400 nm. The products were characterized by X-ray dif…
We observe a distinct anomaly in dielectric permittivity $({\ensuremath{\epsilon}}^{\ensuremath{'}})$ as well as relaxation time $({\ensuremath{\tau}}_{0})$ versus temperature $(T)$ pattern at the antiferromagnetic transition point ${T}_{N}$ in a single crystal of $\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3}$. The equivale…
End-tethered polymer chains usually adopt mushroomlike structures on the surface when their density is low. The behaviors of these surface-attached hemicoils are described by existing polymer theory. Dolan and Edwards derived the free energy of a single polymer chain confined between two planar surfaces. Their theory…
Advanced qualification methodology for actively cooled plasma facing components, Durocher, A., Escourbiac, F., Grosman, A., Boscary, J., Merola, M., Cismondi, F., Courtois, X., Farjon, J.L., Missirlian, M., Schlosser, J., Tivey, R.
BACKGROUND: Spiroketals and the corresponding aza-spiroketals are the structural features found in a number of bioactive natural products, and in compounds possessing photochromic properties for use in the area of photochemical erasable memory, self-development photography, actinometry, displays, filters, lenses of va…
Wie aus dem Nichts: Starke photoinduzierte Änderungen des Ferromagnetismus wurden an der Grenzfläche zwischen Goldnanopartikeln (Au-NPs) und ankonjugierten Azobenzolthiolen beobachtet. Die photomagnetischen Effekte können einem Wechsel des bei der Photoisomerisierung des Azoliganden auftretenden Ladungsverlustes und d…
We report on Raman measurements carried out on ${\mathrm{Ca}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ and ${\mathrm{Sr}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ double perovskites as functions of pressure $(0--15\phantom{\rule{0.3em}{0ex}}\mathrm{GPa})$ and of temperature $(298--370\phantom{\rule{0.3em}{0ex}}\ma…
Choosing the proper material testing technique is important not just for economic reasons; in many circumstances, it can save lives. Building on the common links among all types of material evaluation methods, Introduction to the Principles of Materials Evaluation presents a thorough examination of all types of destru…